xeroc.
Perhaps until we have everything ironed out you should have your bot require an input to publish. So for example it will pull pricing and convert it to human readable form, and give a prompt. Would you like to publish this feed? Yes or No.
Alternately if this would be too much of a pain to implement you could change it so that rather than submitting the transaction to publish it just printed the transaction to screen. Then witnesses would have to double check the numbers, copy paste, and publish manually.
Ultimately if we need to manually update feeds 3 times a day or so for the first few days we will all be okay.